James d



(Mo del.)

J. PIERCE.

COVERING FOR STEAM PIPES, 8w. No. 252,400. PatentedJan. 17,1882.

I Wilizes sm.

UNITED STATES JAMES D. PIERCE, on

PATEPIIWQEELCEA 1 MILWAUKEE, WISCONSIN, ASSIGNOB OF ONE-HALF 'TO HENRY CLAY BRADLEY.

covergme FOR STEAM-PIPES, 8w.

a SPECIFICATION formingpart of Letters Patent No. 252,400, dated January 17, 1882,

Application filed June 24, 1881. (Model) To all whom it may concern:

Be it 'known that 1, JAMES D. PIERCE, of Milwaukee, in the county ofMilwaukee, and in the State of Wisconsin, havetinvented certain new and useful Improvements in Coverings for Steam-Pipes, Boilers, 8110.; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to covering for pipes,

10 .boilers, &c., and will be fully described hereinafter. i i

In the drawings, Figure l is a perspective view of a section of pipe-covering embodying my invention.

same. Fig. 3 is an edge view of a sectionof covering for flat surfaces; and Fig. 4 is an end view of a section of pipe-covering, the edge of'which are spread apart. I

My improved covering is composed of two.

or more layers of paper, a, ,which may be varied in number according to the thickness desired, and these layers may be either corrugated, indented, or plain. I make'the pipecovering by wrapping the paper about a mandrel and cementing or otherwise securing each layer'to that immediately below it, as shown at A A A! A, Figs. 3 and at, at intervals. I The structure may now be cut open by a knife or saw through the center of the cemented line and the structure slipped off the mandrel, and

as the edges of the layers of which it is composed are securely fastened together, it. may be packed and transported without injury.

If my covering is designed for a flat surface,

5 I merely secure flat layers of paper to each other in lines A, and through these make the cuts which divide the covering into blocks or sheets.

As the layers which compose my improved 0 covering are only secured together in lines Fig.3 isanend View of the through which the dividing-cuts are to be made, there will be left between the layers at other points-those between the secured portions-a great deal of space for non-circulating or dead air, and this gives to my covering the maxi- 5 mum power to resist the passage of heat through it.

I am aware that paper covering has been made for pipes, 866.; but thela-yers of which this covering was composed were cemented to' each other throughout the entire structure, and the covering was therefore so dense that its non-conducting propi-rties were very greatly lessened.- y

My covering, except at the points A, is as full of air-spaces almost as hair or sponge, and may be manufactured entirely at the shop, to be cut to the proper 'size either in the shops or Wherev'er the covering is to be applied.

What I claim as my invention, and desire to secure by Letters Patent, is

l. A covering for pipes, boilers, 860., consisting of layers of paper so secured together at intervals as to form airspaces, substantially as set forth.

2. The method of pi eparing paper coverings herein described-that is, placing layers of paper one upon the other-and securing'them together at intervals, as by pasting, so as to form inermediate air-spaces, and: cutting through the pasted portions to divide the covering into blocks or sheetsof the size required.

In testimony that I claim the foregoing I have hereunto set my hand this 11th day of June, 1881.

JAMES D. PIERCE Witnesses:

STANLEY S. STOUT, HAROLD G. UNDERWOOD. 

